There are three sizes but no dimensions. As best I can figure, Size 0 is for those who are under 18. Size I for those who are 18-30 and no kids. Size II for those who are over 30 or have had kids. They have a little nub instead of a stem.
Could someone who speaks Spanish ask them for the dimensions of their cups? Thanks.
Never mind, they don't seem to be available after all. There's no way to order at their site.